Chain-grate stoker



F. C. SELLENS.

CHAIN GRATE STOKER.

APPLICATION FILED MAR. I2. 1918.

Patented Dec. 6, 1921.

INVENTOR. eib aw BY ,1

// A TTORNE YJ.

WITNESSES.-

v as indicated in FRANCIS CHARLES SELLENS, OF LONDON, ENG-LAND, ASSIGNOR TO THE BABoocK &

WILGOX COMPANY, OF BAYONNE, NEW JERSEY, A CORPORATION OF NEW JERSEY,

CHAIN-GRATE STOKER.

I Specification of Letters Patent.

Patented Dec. (i, 192] Application filed March 12, 1918. Serial No. 221,979.

T 0 all whom it may concern Be it known that I, FRANCIS CHAPLns SELLnNs, a subject of the King of Great Britain, residing at London, England, have invented certain new and useful Improvements in Chain-Grate Stokers, of WhlCh the following is a specification.

With many forms of stokers and certain forms of fuel there is a considerable loss of the latter owing to what are known as riddlings or small coal which pass through the links and are deposited in the front of the ash pit, where they are from time to time removed and necessarily before the removal of the ordinary ash or clinker from the back of the ash pit, if the fuel is not to be lost.

The object of the present invention is to collect such riddlings and deliver them at a point external to the ash pit, as, for example, on the firing floor, from which they can be easily removed as occasion demands, and refired.

The invention will be understood by ref-o erence to the accompanying diagrammatic drawing which indicates inside elevation one means by which the invention may be practised.

Referring to the drawing the numeral 1 designates a portion of a chain grate or simi lar traveling stoker which may be of any approved type, mounted and supported to travel in a well-known manner. A short distance below the forward end of the lower run of the grate is a fixed plate 2 upon which the riddlings or small coal may fall, the drawing, and along which they are drawn by the lower run of the grate and discharged therefrom. To receive the riddlings and to prevent them falling into the ash pit, I provide a tipping tray 3 pivoted at 4:, and if desired, counterweighted. In its inner position, shown in full lines, the tray support rests against {a stop 5. To dischar e the tray it is drawn 7 fall through the upper and external to the ash pit and be prevented from becoming mixed with the residual ash and clinker when the ash pit is cleaned.

The drawing shows the invention in its simplest form, but it will be obvious that in installations where it is desired that the tray 3 should extend further under the grate, any well-known method of supporting it mry be employed, as, for example, the tray might be carried on blocks or rollers giving it a parallel course for a portion of its path.

What I claim and desire to secure by Letters Patent of the United States is:

1. The combination with a chain grate stoker arranged to permit fine riddlings to fall through the upper and the lower runs of the grate, of a plate beneath the forward end only of the lower run of the grate and closely adjacent thereto, said plate being falling through the upper run of the grate and hold them in position to be moved toward the front of the grate by the lower run of the grate, the grate being arranged to cooperate with the plate to carry the riddlings to the front of the grate independent of the grate ash delivery.

2. The combination with a chain grate stoker arranged to permit fine riddlings to the lower runs of the grate, of a plate beneath the forward end only of the lower run of the grate and closely adjacent thereto, said plate being adapted to receive the riddlings or small coal falling through the upper run of the grate and hold them in position to be moved toward the front of the grate by the lower run of the grate, and a movably mounted tray in advance of and below said plate to receive the riddlings from said plate, the grate being arranged to cooperate with the plate to carry the riddlings to the front of the grate independent of the grate ash delivery.

3. The combination with a chain grate stoker arranged to permit fine riddlings to fall through the upper and the lower runs of the rate, of a plate beneath the forward end onTy of the lower run of the grate and closely adjacent thereto, said plate being adapted to receive the riddlings or small coal falling through the upper run of the grate and hold them in position to be moved toward the front of the grate by the lower run of the grate, and a pivotally mounted tray in advance of and below said plate to receive the riddlings from said plate, the

grate being arranged to cooperate with the plate to carry the riddl ings to the front of the grate independent of the grate ash 10 delivery.

In testimony whereof I have hereunto signed my name in the presence of two subscribing Witnesses.

FRANCIS CHARLES- SELLENS.-

itnesses: V

H..BR0WN, H. P. SMITH. 

